Update: The files were removed because of performance problems.
Just found this reference, and users of the QTEK 1010 (a.k.a XDA) might want to try it: a ROM update to version 3.16.13 (09 Jan 03) and a radio stack update too!
Of course it's very important to follow the instructions, and make sure you have a current backup! Also, check that you don't have a newer version of the ROM already. The download file is 13.1Mb in size.
Important note: Do not upgrade through USB hub, it may cause a communication error and render your device unusable! Always connect the Pocket PC directly to a USB port