Hi,
I did the same thing and tried everything, it took a post to helpjoomla.org forum to find out how to do it
it involves settting a query up in MY php admin to add the missing link to the database
Because the files are still there, you only have to create a new reference to the module in jos_modules
Use phpMyAdmin:
backup the database first, then run the following query:
INSERT INTO `jos_modules` VALUES (31, ‘Wrapper’, ”, 15, ‘left’, 0, ‘0000-00-00 00:00:00’, 0, ‘mod_wrapper’, 0, 0, 1, ”, 0, 0);
if id=31 already exists, replace it with a zero (and it will get a unique number assigned automatically).