CmdTool2 should work on 32 bit kernels. Linux x64 versions require certain libraries to be present in the system. As you see from the CmdTool2 utility, we've got FreeBSD, Linux (RedHat SUSE and Debian) and Solaris versions available. I do not know how it will function with Citrix Xen, but from your segmentation fault results it doesn't look positive.
You're not entirely right about debian support.
The package is a 32bit rpm. Whilst "alien" can convert rpm to deb format, it's not perfect and it fails miserably if there are architecture conflicts (eg, trying this on a 64 bit box)
Please consider making native deb packages and PLEASE consider making 64bit packages available for RPM/DEB. A lot of higher-end systems are 64bit _only_ and it's annoying/irritating/difficult to get authorisation to install i386 libraries to support an external package.
An admin stuck in the crossfire....