For correct working of wgPicasa and wgPicasaPRO you need to use :
- php5
- and enabled the curl library (which is enabled standard in a normal configuration)

wgPicasa PRO 3x

Joomla 3x only (9 euros only)
Free updates till end of life of Joomla 3x

wgPicasa PRO 25

Joomla 1.5 and Joomla 2.5 (5 euros only)
Free updates till end of life of Joomla 25x

wgPicasa Lite 3x

Joomla 3x only

Download

wgPicasa Lite 25 

Joomla 1.5 and Joomla 2.5

Download