Hodge Pathways, I assume you mean Hodge Podge? It's available here: http://www.angelfire.com/mi4/cactusbob2k2/marble/hodgepodge.zip (this is a ZIP file, open it and it will give you your .mis and .png files)
A Day At The Beach, you will have to ask Solo Hans for. His e-mail is solohans1@excite.com
For the most part, if you want a custom level, you will ask the author. Usually, authors announce the creation of new levels on this forum: http://www.garagegames.com/mg/forums/result.forum.php?qf=84 . If you need help on installing custom levels I can help.
Bobby
A Day At The Beach, you will have to ask Solo Hans for. His e-mail is solohans1@excite.com
For the most part, if you want a custom level, you will ask the author. Usually, authors announce the creation of new levels on this forum: http://www.garagegames.com/mg/forums/result.forum.php?qf=84 . If you need help on installing custom levels I can help.