Another option would be to boot from a usb stick, if your mobo supports it. Most major linux distributions support booting from usb. Also, several recovery tools are available and capable of usb booting.

Hanging boot and cannot boot to disk
Our migration from 5.3sp1 to 2011sp1 will happen for period of 2-3 months, but content will be added on production during that time in tridion 5.3sp1. 
After the migration activities we will have migrated system on 2011sp1,  

But now i want to migrate new content from production(which is still in 5.3) to upgraded DB.

Content porter version 2.3(currently being used in 5.3sp1 ) is not supported in 2011.

What would be the best approach for this?
