I am talking about E90 , inner screen :
1) QuickOffice is built-in . Upgrade is free > QuickOffice > Options > Upgrade
Options are : Find , Go to : Top , Middle , Bottum .
However the old (not upgraded version) has the ability to use the nummeric buttons to scroll : 1 = 10% , 2 = 20% , etc
2) LightNotePad
http://www.petnetti.net/lightnotepad/indexE.shtml
has the ability to scroll down by the lower softkey and scroll up by the green key .
Though , it remembers the last position of the cursor !
Caveats : It's actually designed for small files , and when the app is asking for "safe before exit" ONLY use the softkey (not D-Pad) for saving text changes .
3) the filemanager X-Plore
http://www.lonelycatgames.com/?app=xplore has a built-in text viewer . This has the ability to fast scrolling : Up = Q-key , Down = A-key .
4) DEdit is another text-editor
http://jbak.ru/ . It can handle big files , but will replace the built-in text editor in many occasions .
However the possibility to store files on memory-card , beats the built-in text editor , which stores files in a hidden folder on the device memory .

Regards jApi NL