I don't have 64-bit Windows installed, but I can get it from MSDN. That would take me quite while to get everything up and running.
Also, I can't seem to download the source code from the CVS for qliner for some reason. It keeps saying the repository has been relocated temporarily. However, I took a browse through the online version of the code and it appears to be straightforward C# for the most part coupled with a Win32 C++ hook. Also, the C# .csproj files show that the executables weren't compiled to be 32-bit specific so it is highly like that qliner is having the same problem that Circle Dock has and you simple just have to add in the instruction to build as x86 into the .csproj files.