This post is majorly for users who just upgraded to the latest Simple machines forum (smf) version 2.0.3 and having any kind of difficulties installing older version of smf modifications ( smf mod) like smf mod made for version 2.0.1 , 2.0.2 , 2.0 etc .
If you haven't upgraded to the latest version of smf , it is recommended you do so immediately to correct some security flaws in smf 2.0.2 and lower versions including some hole that permits lager number of daily spam registration . You can easily upgrade to smf 2.0.3 by logging in as admin and going to package manager ==> locate the upgrade notification in the right and click to apply
Now talking about installing older version of smf mod in smf 2.0.3 ==> from same package manager window after you must have logged on as admin => click on advance ==> emulate other versions ==> enter smf 2.0.2 as seen in the pix below
==> click apply to start using other version of mod on smf 2.0.3 . Remember to always do a backup before installing new mod
Now one point to note is that most older versions of smf mod can easily break (wreck ) your forum if you are a newbie which may even force you to do a large upgrade . So to avoid this you need either backup your smf site before installing new mod or use the already provided php parse tool in the smf modification site
to parse the mod for the version you wanna install it on ==> look at the pix below for more info