You'll need the patch tagged abb\_e58b432 from [git://github.com/grwl/qubes-core.git](git://github.com/grwl/qubes-core.git).
The rest is in RPMs, yes. I roughly follow this procedure to have pvusb on Qubes 1.0:
- rebuild kernel, core, and xen from marmarek's repo (devel-3.4 branch for kernel),
- make dedicated usbvm domain, passthrough USB controller PCI devices there
- in usbvm: "rpm -Uhv qubes-core-vm-2.1.1-1.fc17.x86\_64.rpm xen-libs-2000:4.1.3-18.fc17.x86\_64.rpm xen-qubes-vm-essentials-2000:4.1.3-18.fc17.x86\_64.rpm"
- in appvm where you want to attach the device to: "rpm -Uhv qubes-core-vm-2.1.1-1.fc17.x86\_64.rpm"
- in dom0 I think the following packages need to be updated, don't have exact list now.qubes-core-dom0 is actually important, the rest are dependencies: