Landmass elevations

[whiteice]

Hi,
just down-loaded a freeware scenery zip file called 'New York and New England 1-Arc Second LOD 10 Terrain Mesh'.  Followed all the install instructions and it works great, in the U.S., (+35 fps.) - The area also covers a portion of Canada, (southern Ontario) and some of the airports, lakes and other landmass [in that area] now have the wrong elevation.  Short of re-installing FS 9, any suggestions?
Thanks a lot.

[dave3cu]

Such problem areas are found to some extent in many terrain mesh addons.

[whiteice]

Much appreciated, Dave.  Will give it a try.
Still kind of new at all this.
Thanks for your help.

whiteice.

[nickle]

Payware is likely a better choice.  Entire USA for $35 . Landclass separate payware or both for about $40.  I did the separate payware. No problem with floating airports etc.