Tech support told me to run them through Sample Tank because they are 32 bits. 

Matron Landslide
From memory if you have SampleTank, you can run Tron and Moog from within it...

 
Running the other softsynths' multisamples through SampleTank is easy enough. It's just a case of setting the multisample filepath one level higher so that it picks up all the other softsynths' multisamples in addition to its own. It doesn't preclude the use of the other 4 softsynths, as the multisamples can be shared. I've used it this way in the past. However, SampleTank is very sluggish and I prefer not to use it in place of the other, much snappier, softsynths. I actually stopped using SampleTank in my last setup, as it kept prompting me to re-authorize it every time I launched it. None of the others did that.

vladasyn
Tech support told me to run them through Sample Tank because they are 32 bits.

 
I've got SampleTank v2.5, not 3. It's 32-bit.

msorrels
They changed bitbridge and the plugin manager a while back.  Before then it was hit or miss if the 32-bit IK plugins would work on a 64bit machine...

 
Maybe I should have mentioned this earlier, but I have not yet installed the 64-bit version of Sonar Platinum. I use the 32-bit version far more often, and I want to get it up and running first.

msorrels
...It's also the install location.  I don't put plugins in c:\Program Files...

 
I've now uninstalled all the IK items that were installed within the Programsx86 folder and re-installed some of them (including Authorization Manager) in non-system folders. This has not changed their behaviour at all. They all still crash Sonar if it is not run as administrator.

By the way, the T-Racks plugins don't seem to cause any problems. It's just the softsynths and the CSR reverbs.
 
[EDIT]
...and also the AmpliTube plugins.

You may be on your own with 32-bit SONAR, given the memory requirements of modern sample libraries 32-bit DAW software just isn't very practical.  Even from an audio tracks only, 32-bit DAW software just can't provide enough memory to make it worth using. 
 
Since Sampletank 3 is 64-bit only you don't really have that as a choice if you insist on using 32-bit SONAR.  I suspect you will not be able to run Sampletank 2.5 instruments in 32-bit SONAR without running SONAR as admin (unless you can go back to Windows XP, which I'm not even sure modern SONAR will run under anymore). 
 
And it's not just SONAR, other DAWs had/have problems with those old IK plugins.  And IK will not fix them (they could have, years ago but chose not to and now have moved on).  Their only work around solution is to upgrade to Sampletank 3 and 64bits.
 

That modest RAM footprint was one of the reasons SampleTank 2 was so popular. If someone isn't into sampled instruments in a big way, e.g. they are mainly recording audio, then 32 bits need never be a limitation. At least, not until the day comes when some must-have plugin is offered only in 64-bit, but that day is still years away.
 
Kev, it's actually a good thing that ST3 is 64-bit only, as that'll save you from making a purchase you might regret. I bought ST3 on the assumption that a) it would be like ST2 only better, and b) I could continue to use all my ST2 libraries. I was disappointed on both counts.
 
While running as administrator is generally frowned upon for security reasons, the risk is very low when specific trusted programs are run as administrator. For malware to exploit that practice, it would have to infect sonar*.exe or a DLL that SONAR calls, most of which are protected system files. Nobody's going to write a virus and name it Dimension Pro.dll.
 
BTW, SONAR still runs fine on XP. 

I think the free Sampletank 3 will now (didn't at first) let you import libraries, so Sampletank 2 users don't have to purchase anything anymore (I haven't done this since I bought Sampletank 3, so I could be wrong you should check it to see).  But it is 64 bit only.
 
The security issues with run as admin are pretty minor, but the loss of drag and drop kind of kills it for me.  Also issues with clipboard stuff/etc.
 
That's cool SONAR still runs on XP.  I have 3 boxed licenses in the closest I bought as "protection" when they announced it was going away, but at this point I doubt I'll ever install them.

bitflipper
...While running as administrator is generally frowned upon for security reasons, the risk is very low when specific trusted programs are run as administrator. For malware to exploit that practice, it would have to infect sonar*.exe or a DLL that SONAR calls, most of which are protected system files. Nobody's going to write a virus and name it Dimension Pro.dll...

 
I keep my DAW PC offline most of the time anyway, so security risk is minimal.

Actually, there is one difference between the way I am installing everything now compared to the way I did it last time. On my previous setup, I was still using Sonar X3 initially. Although I had just taken advantage of the "infinity" offer at the time, I had not yet migrated to Platinum. I installed X2 followed by X3 followed by Platinum. Next I installed all the plugins (including the IK stuff), but ran the plugin scan from X3 long before launching Platinum. This may or may not be significant.