For these cases I have saved the appropiate cabs for TomTom: Navigator, GPS, Voice, Wizard.
I can now re-install without my PC.
Saving the cabs is possible when you do the install without the pocketPC connected and the search your machine for any cab files.
Remeber to put a file with the act code for TomTom if you really want to be independent for re-installing
HTC Vision (Desire Z) with 13th Gen Dual SIM on TMO and Voda
Previously owned MDA Vario IV, MDA Vario and MDA II