The answer to your first question is "Yes, Notes and AS/400 integration is complex" and "Yes, you can do it with LotusScript". I'll guess from your questions that you know LotusScript quite well, but the fact that you can use LotusScript does not simplify the integration challenges. The most straight-forward setup you can use is a combination of the Lotus Connector for DB2, which works great with DB/400 data, DECS for Forms-based functions, LEI for higher volume and back-end data moving and synchronizing, and the Lotus Connector LSX ("LC LSX) for everything else. I suggest you start by visiting http://www.lotus.com/ei and check out the various links. You should also go to the IBM Redbooks home page ( http://publib-b.boulder.ibm.com/Redbooks.nsf/portals/lotus) and search on " Lotus AND DB2". You will see several related books and RedPieces that will be very informative.
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