Uninstalling IE7

Hi,

I have a client with software that is only comatable with IE6.

I have gone through the procedures for uninstalling IE7: Add Remove Programs, running Spuninst.exe.

However after reboot IE7 is still there! Now it is not in Add/Remove, nor is c:\windows\system\ie\spunisnt.exe.

I have tried twice.

Any suggestions?

Johnathon