I have a new player with firmware version:
New Player

2005/12/16
3.5.35
2006/03/31
JTYMD046V4

It doesn't have the custom ipod firmware like my last one does.

The firmware on my last one is:
Old Player

SC85051E
2006/04/07
ACT_V3.5.35

It has the custome ipod firmware. I wanted to put the firmware from my old player on to my new player. What will happen if I do this? Will it mess it up? Or will it just have all the features that my old player had on it?