Yes it is normal, you can disconnect from the web, turn off your Anti virus and it will load quicker. I installed the patches for 11, 12, 13 before I put them into jsgme, less time waiting on three extra overwrites. I did not use jsgme after the first install. I just took each pack and pasted them over the vanilla #DBW folder. It's 100 times faster and I have a back up to the original. Once you have it installed and working I highly recommend if you have the storage space to copy that #DBW folder and store it somewhere. If your install gets hosed just use the jsgme to remove mods like Ecran wide, TIR, Forgotten countries to where there is nothing left in your DBW folder except the Full Monty, then delete it, copy and paste your back up and yer ready to go again. Just put back in your extra mods you took out earlier. I hope you read the instructions very carefully, there is a point where it won't start, pack 14 I believe, but if you load pack 15 it will work just fine, it's missing a entry somewhere that the STD folder in pack 15 fixes. You are starting the game after each install right?......................I hope so.... that way you'll know which pack you had problems with when it didn't start.
Keep at it
Cheers
Hoss