Is there a way to change the boot path on the 2nd and 3rd switches in a stack of 3?  When I attempt,the "session-2" switch will not let 

me go into config mode. I can see the correct image file I would like to boot in flash already and have checked the md5 values too. I assume

there must be a way to do this from switch 1, but not sure. Here is flash of switch #2 in stack of three:

Directory of flash:/

2 -rwx 10036 Feb 28 1993 19:04:35 -05:00 vlan.dat
3 -rwx 58495 Feb 28 1993 19:05:35 -05:00 config.text
4 -rwx 1915 Feb 28 1993 19:05:35 -05:00 private-config.text
5 -rwx 17303808 Jan 12 2016 10:11:50 -05:00 c3750-ipbasek9-mz.150-2.SE9.bin
6 -rwx 58319 Feb 28 1993 19:05:34 -05:00 config.text.backup
8 -rwx 5 Feb 28 1993 19:05:34 -05:00 private-config.text.backup
9 -rwx 3096 Feb 28 1993 19:05:38 -05:00 multiple-fs

Now, when I look at"show boot" of switch #2, it shows the following:

UAHs0401-2#sh boot
BOOT path-list : flash:/c3750-ipbase-mz.122-50.SE3.bin
Config file : flash:/config.text
Private Config file : flash:/private-config.text
Enable Break : no
Manual Boot : no
Allow Dev Key : yes
HELPER path-list :
Auto upgrade : no
Auto upgrade path :
NVRAM/Config file
buffer size: 524288
Timeout for Config
Download: 0 seconds

Any idea how I can get switches 2 & 3 to load the ipbasek9-mz.150-2.SE9.bin file ??

Thank you