So, I tried twice to install the app, the third time I took thorough notes on what happened and these are the notes:
Was trying to download amvapp and all was going smoothly but while installing H264 asked to install nero and to make sure connected to internet to do it. Click yes/okay (can't remember which but basically approved it) but then when it tried error message pops up saying H264 Tools 1.0 Setup on title bar of it and only thing it says is "Download Error" and only option to click OK.
Then the wizard says H264 has been installed and to close the wizard, then wizard continues installing amvapp by prompting installation of YUVCodecs 1.2 and everything goes smooth and fine from there.
When AMVApp 3.0 finishes installing, checked option to run AVIsynth and DGMPEGDec tests and clicked finish. Tests wizard opens, selected install and these are the results:
Test 1 - Version Test
-Window pops up with title error mplayer2.exe entry point not found and says "The procedure entry point RunDIIW could not be located in the dynamic link library msdxm.ocx
-Then new window says mplayer2.exe has stopped working and windows must close the program
Test 2 - Colorbars Test
Exact same error as first.
Preparation: "Automatically creating d2v file... This will flash up very quickly and close automatically"
-worked correctly
MPEG2 Test 1: YUY2 Colourspace
Exact same error message as first
MPEG2 Test 2: YV12 Colourspace
Exact same error message as first
MPEG2 Test 3: RGB32 Colourspace
Exact same error message as first
Were all tests successful?
-No
Took me to the troubleshooting page where none of the issues there matched mine, to which it suggested I post in the forum and hopefully someone can help

I'm thinking it's because it couldn't get nero? Or, whatever the "download error" was that it was having while installing H264? Anyone have any suggestions on how to fix this or had a similar problem resolved?
Thanks!