Difficulties installing O/S updates

i recently had to update a DV unit at a customer site, the instructions said to copy the "FullPackageUpdate.zip" and the "StartUpdLdr.apk" files to root of the SD card, install and run the apk file. 

the startupldr came up but there was no indication of any activity or progress; after waiting about 5 minutes I took the unit home and updated it via MSP; worked perfectly.


has anyone else run into similar issues, did I simply not wait long enough?


p.s. I did not attempt the "recovery" procedure.