0. umount the target partition (in this example /home)
egg:/mnt/a# umount /home

1. make a dd copy of your target partition

egg:/mnt/a# dd if=/dev/mapper/rootvg-home of=home.dd bs=4096 conv=noerror
653312+0 records in
653312+0 records out
2675965952 bytes (2.7 GB) copied, 119.87 s, 22.3 MB/s

2. scan the whole partition with the reiserfs command:

egg:/mnt/a# reiserfsck --rebuild-tree --scan-whole-partition home.dd 
reiserfsck 3.6.21 (2009 www.namesys.com)

Will rebuild the filesystem (home.dd) tree
Will put log info to 'stdout'

Do you want to run this program?[N/Yes] (note need to type Yes if you do):Yes
[...a bunch of useless output deleted...]
Flushing..finished
	Objects without names 6611
	Empty lost dirs removed 3060
	Dirs linked to /lost+found: 807
		Dirs without stat data found 23
	Files linked to /lost+found 5804
	Objects having used objectids: 5641
		files fixed 4912
		dirs fixed 729
Pass 4 - finished       done 0, 0 /sec
	Deleted unreachable items 3145
Flushing..finished
Syncing..finished
###########
reiserfsck finished at Mon Oct 28 15:20:48 2013
###########

3. create mount point for home.dd and mount it:

egg:/mnt/a# mkdir /mnt/recovery
egg:/mnt/a# mount -o loop home.dd /mnt/recovery/

4. Your undeleted files should be in /mnt/recovery/lost+found