Marcus has posted some instructions on installing .NETCF v2.0 runtimes to a Windows Mobile 5.0 device. Of course you may wish to deploy to Pocket PC 2003 devices too, again it's a RAM install, and you can follow the same basic steps. There are a few points to note:-
C:\Program Files\Microsoft Visual Studio 8\SmartDevices\SDK\CompactFramework\2.0\v2.0\WindowsCE\wce400\armv4\NETCFv2.ppc.armv4.cab
http://www.opennetcf.org/forums/topic.asp?TOPIC_ID=432
Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in anyway.