tree structure calculation acces, sql server

I have a database that manages data sets hierarchically organised (tree structure). The tree structure is in a treedata table, with data such 'dataset','N', 'fatherN', 'isHidden' isHidden allows to show/hide nodes. Some elements are computed such as depth in the tree, outline header (with a 1.1.1.1... pattern), reading order Code has to perform : a- verify tree structures (especially detect cycles), b- calculate node attributes depth, reading order and outline header (global calculation), c- move a node in the tree without having to recalculate all the node attributes (smart recalculation). Speed for attribute calculation (smart and global) is the major issue. Attributes are to be written to the node attribute table. Tree visualisation is not required. Please read the specification enclosed. Thanks, ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Script is executed under VB6 (vbscript under access is ok, t-sql stored procedure not OK). Connection to the database is done through ADO. The main target is Access 2000 The code should include adaptation for working with Sql Server 2000 and mysql5.0.