Infotype 0030 - fast entry PA70 / RP50M

Hello
I am trying to do a fast screen for infotype 0030 (PA70). Everything is fine, but on my system infotype uses texts (RP50M table).
I have created proper screen with proper fields (screen 5000, with field RP50M-TEXT1) but during save - field TEXT1 is not populated to infotype, even it dissaper after 'enter' on screen.
As i assume, includes for fast entry does not include structure for RP50M-TEXT*, so my question is, if there is any option to do this?