Foren / Cotonti / Extensions / Gallery of URLkiller

I mean if I upload a picture with page_avatar. The width is always the same.

I use: foto|datas/fotos|thumb_-100-100 thumb200_-200-200 thumb250_-250-250 thumb300_-300-300|0||frame

I want the biggest site to be eg 300. If landscape width should be 300 and in portrait the height should be 300.