Aww, that's some awful scans.
btw I'm not getting as good results as alexnoe either, but I think that may be due to the LTC-48161H drive I use to scan with.
I get about 12.0 average PI and 0,2 average PO as the best results.
Writer is memorex Dual-X (OEM pioneer 106).
Same disc scanned in a LTD-163D gives about 6.0 average PI and 0,6 average PO.
Since I do not have the LTD-165 I can't comment on that one.