Hi, so it seems as though there are some problems with the old download links so I thought I'd make a new thread with the new links in, just so that they don't eventually get lost in the middle of the other thread.
Download Here
Install the mod to the location where you installed M2TW, by default this is:
C:\Program Files (x86)\SEGA\Medieval II Total War\mods
Scotland Hotfix
Extract the LN_Lmail_Hmail_scotland.texture file to this location where you installed M2TW:
...mods\Rule_Britannia\data\unit_models\_units\ln_lmail_hmail\texture