Its really not hard...
First look at the dynamo website and use the links to get all the programs listed at the bottom.
Then follow the instructions given on the site - the programs will quickly become familier to you trust me, it only takes a few days to become a master. eg To apply the solidus and dynamo patches you simply use the 'import patch' function in AFS explorer.
Once you finished editing that you just use the 'import file' on CDMage to overwrite the filedata file you're editing.
Then just burn the image it to disc using nero.
As far as an EPL patch is concerned, the DrXray one is great for what it does! It has teams, players and kits from the the 3 divisions and is quite superb to play. However if you want to save yourself a disc then consider the WE-UK patch, which is in essence the same, but far more complete and probably more proffesional, with better stats and updated lineups etc go to
http://www.we-uk.pwp.blueyonder.co.uk/index.html to find out how its going, tho I read it's released perhaps on monday!