source control on visual studio 2003 with RTC 4

Hi all,
what is the best way to versioning code (.net 1.1) edited on Visual Studio 2003 with RTC 4 .

The solution I've tried so far is to use "Rational Team Concert Shell" versioning the directory.

I've explored these alternatives, but both unsuccessfully:
1) RTC-VisualStudio-Client 4.0.2 is not compatible with Visual Studio 2003
2) use as sourceControl the RTC-MSSCI-Client but on VS2003 doesn't  work.

here the error on using MSSCI client:

There was a failure while initializing the MSSCCI Provider source control provider. You cannot use this provider to perform source control operations

Best Regards

Mauro