in the attachment to this post you can find savegames of the first part of the temple. Just download the file, unzip it and copy the files to your savegame folder.
As the savegames are displayed by date inside of the game, they might not show up on top when you open your savegame menu. Just scroll down till you find the numbered files named "C3_temple_01", "C3_temple_02", and so on.
Depending on where you got stuck, it should be one of the files in the middle, probably between 06 and 10. Just try loading different ones until you find the correct one.