You might consider installing the Compact Framework 1.0 SP3 in main memory, and installing FeederReader on your Storage Card with your feed data. That way, the installation files won't be taking up your RAM.
There are some bugs in the older Compact Framework 1.0 SP2 and SP1 that prevent some feeds from downloading and/or parsing properly in FeederReader.
It should generally work and function properly, but my ability to help you solve any problems with it is limited.
I only officially support and test using SP3, but if you try a previous version and have problems, please mention your Compact Framework version if you post to the FeederReader Forums.
Greg Smith
Author, FeederReader - Pocket PC *direct* RSS text, audio, video, podcasts
www.FeederReader.com - Download on the Road