I think re-validating winpe in Configure Services and re-pointing to your WAIK install should recreate the boot.wim and boomedia.wim images.
Push come to shove, you can (/should ?) just have a test server that you can copy the file from, if need be? .
The above suggestion may involve less effort though and should be tried first .
- Paul Hoffmann
LANDesk EMEA Technical Lead